Snack food



FIG. 1 is a perspective view showing my new design;

FIG. 2 is an elevation showing the front side of my new design, the left side, right side and rear of my new design having substantially the same ornamental appearance as the front side;

FIG. 3 is a top view showing my new design; and,

FIG. 4 is a bottom view showing my new design. 

The ornamental design for snack food, as shown and described. 